Friction force

......... slows down the moving object

فن العلوم عماد الششتاوي

• Heat energy

• Friction force

• Movement force

• Kinetic energy

Tags

NGSS.MS-PS2-2

Friction force acts in a direction ........... the direction of motion

فن العلوم عماد الششتاوي

• Opposite to

• Perpendicular to

• Parallel to

• is the same

There is a friction force between ..........

• The bicycle's tire and ground

• The ball and the ground

• Two books touch each other

• all answers

When the speed of the moving object increase the friction force ..............

فن العلوم عماد الششتاوي

• Increase

• Decrease

• Does not change

• Decrease and increase

Friction force increases .............

• By decreasing the surface area of object

• Between smooth surfaces

• between rough surface

The stopping of a bike during movement is due to the increase in ...............

فن العلوم عماد الششتاوي

• Friction force

• attraction force

• Magnet

• Light energy

Tags

NGSS.MS-PS2-2

The moving bike is affected by air resistance that acts ............... to its movement

فن العلوم عماد الششتاوي

• in the opposite direction

• in the perpendicular direction

• Paralel

• In the same direction

Air resistance increase when.................

فن العلوم عماد الششتاوي

• the car velocity increase

• the car velocity decrease

• the car change its direction

• the car doesn't move

Modern cars are designed in stream line shape to ..................

فن العلوم عماد الششتاوي

• increase air resistance

• decrease water resistance

• be attractive

• decrease air resistance

Tags

NGSS.MS-PS2-2

Air resistance for a moving car depends on ..................

• Speed

• Area

• Colour

• Speed and area